Baffle for heat-exchange apparatus



March 25 1924. 1,488,053

R.MCGREGOR BAFFLE FOR HEAT EXCHANGE APPARATUS Filed March 14 1922 .'5 Sheets-Sheet 1 March. 25, 1924.

`R. MGGREGOR BAFFLE FOR HEAT EXCHANGE APPARATUS Filed March 14 1922 3 Sheets-Sheet 2 March 25 1924. l y I 1,488,053

' R. MCGREGOR BAFFLE Fowl-EAT EXCHANGE APPARATUS -Fled March 14 1922 3 Sheets-Sheet 5 Fatented Mar. Z, 1924.

NETE@ TTES rarest entre.,

ROBERT MCGREGOR, OF ILFOR-D, ENGLAND: SSIS-NOR OF ONE-THIRD TO CLAYTON AND SHUTTLEWORTH LIMITED, OF LINCOLN, RIG-LAND, AND ONE-THIRD TO PHILIP WARWICK ROBSON, 0F LINCOLN, ENGLAND.

BAFFLE FOR HEAT-EXCHANGE APPARATUS.

Application led March 14, 1922. Serial No. 543,752.

To all whom z't may concern.'

Be it known that I, ROBERT MCGREGOR, a

subject of the King of Great Britain andv Ireland, and residing at 158 Balfour Road, Ilford, in the county of Essex, England, have invented certain new and useful Improvements in Baltics for Heat-Exchange Apparatus, of which the following is a specification.

The present invention relates to `water tube boilers and similar apparatus in which it is desired to effect an exchange of heat between a fluid contained in tubes and a second fluid outside the tubes. In such apparatus if the tubes are arranged in rows with passages between the full exchange of heat is not realized owing to the fact that there is a tendency for the Huid circulating around the tubes to pass along the passages formed between the rows without giving up or taking in heat to or from the tubes as the case may be in the manner desired.

I-Iitherto it has been proposed to overcome this difficulty by inserting between the tubes baiiie plates of a curved or angular section partly surrounding the said tubes or by the use of a series of baiiie plates of rectangular section inclined to the tubes which when in position form a solid wall for reliecting the liuid surrounding the tubes. These arrangements are objectionable by reason of the difficulty of making replacements, and the object of the present invention is to overcome this difiiculty and enable apparatus of the type mentioned to be operated with an eliiciency as high as is the case in which tubes placed in staggered relationship are employed.

The invention consists in a heat-exchange apparatus in which are provided tubes arranged in vertical rows with passages therebetween and deiectors situated in said passages, said deflectors being inclined to said tubes alternately in opposite directions.

Various forms of the invention are illustrated by way of example in the accompanying drawings, in which:-

Figure l is a longitudinal view of the tubes of a water tube boiler showing the deiiectors in position;

Figure 2 is a section on the line A-B of Figure l;

illustrated.

Figure 3 is a section as regards its lefthand half on the line C-D and as regards its right-hand half on the line E-F of Figure l;

- Figures 4 to 7 are views similar to Figure l illustrating modilications of the invention;

Figures 8 and 9 are views similar to Figures 1 and 2 showing a further modification.

In the form of the invention depicted in Figures 1 to 3, deflector plates l are placed between the tubes 2 so that alternate plates are inclined in opposite directions as indicated. The effect of this is to cause the flue gases which would otherwise pass substantially straight up the passages between the rows of tubes 2 to be diverted through the horizontal spaces existing between the tubes in the manner indicated by the arrows.

A convenient form of deliector 1 is shown in Figures l and 2 and consists of a plate the width of which along the greater part of its length is substantially the same as that of the passages between the tubes. Near the ends, however, the plate is formed with lateral extensions 3 shaped so as to rest on the top and bottom tubes in the manner These delectr plates are readily inserted edgewise between the rows of tubes and may then be turned into the position indicated so as to produce the required baiiiing effect on the flue gases. If the tubes 2 be of relatively great length we may, as indicated in Figure 1I, employ two or any larger number of sets of deflector plates.

It will be noticed from Figures l to 4 that in order to prevent too excessive battling of the gases we prefer to make the deiectors of such a length that their lower ends do not extend as far as the ends of the tubes. This, however, is not an essential feature, since we may find itin certain cases desirable to make the defiectors extend at both ends to the ends Vof the tubes 2 or, as indicated in Figure 5,

Whole stack, finally becoming horizontal so as to extend under the other half of the stack of tubes.

In Figure 7 we have shown dellector plates which are of curved contour.

In either of these constructions the action is essentially the same as that described with the use of flat plates, namely to cause the flue gases to be laterally deliected throughV horizontal spaces between the tubes.

Figures 8 and 9 illustrate a modiiied form of flat plate in which the lower edges of the lateral extensions 3 are formed at such an angle as to give a wedging action between the tubes upon which they rest, thus helping to maintain the plates in position. These figures also illustrate the employment in the case in which the plates l do not extend across thewhole length of the tubes 2 of covers 4 which may be placed over the spaces between the upper ends of the plates l and the ends of the tubes 2 in order to prevent lodgment of soot or the like.

While the invention has been described in connection with heat-exchange apparatus in general it will be evident that it is applicable to all kinds of apparatus such or example as boilers, superheaters, fuel economizers, cooling apparatus or the like.

Claims:

1. In a heat-exchange apparatus, tubes arranged in vertical rows with passages there* between and deilectorssituated in said pas sages, said detlectors being inclined. to said tubes alternately in opposite directions.

2.' In a heat-exchange apparatus, tubes arranged in vertical rows with passages therebetween and deflectors situated in said passages, said deflectors being inclined to said tubes alternately in opposite directions and of substantially the same width as said passages. Y

3. In a heat-exchange apparatus, tubes arranged in vertical rows vwith passages therebetween, and deflectors formed of plates having their length considerably greater than their width situated in said passages, said deflectors being inclined to said tubes alternately in opposite directions.

In testimony whereof I have signed my name to this specification.

ROBERT MCGREGOR. 

